Vehicle display screen or portion thereof with a graphical user interface



The sole FIGURE is a front view of a vehicle display screen or portion thereof with a graphical user interface showing our new design.

It should be understood that the broken lines in the FIGURE showing a display screen, text, and the fine and bold style broken lines showing portions of the graphical user interface, are used to illustrate portions of the article; all broken lines form no part of the claimed design. 

CLAIM The ornamental design for a vehicle display screen or portion thereof with a graphical user interface, as shown and described. 